The Pyramid of Cestius is an ancient pyramid in Rome, Italy, near the Porta San Paolo and the Protestant Cemetery. It stands at a fork between two ancient roads, the Via Ostiensis and another road that ran west to the Tiber along the approximate line of the modern Via della Marmorata. Due to its incorporation into the city's fortifications, it is today one of the best-preserved ancient buildings in Rome.Physical attributesThe pyramid was built about 18 BC–12 BC as a tomb for Gaius Cestius, a magistrate and member of one of the four great religious corporations in Rome, the Septemviri Epulonum. It is of brick-faced concrete covered with slabs of white marble standing on a travertine foundation. The pyramid measures 100 Roman feet (29.6 m) square at the base and stands 125 Roman feet (37 m) high.In the interior is the burial chamber, a simple barrel-vaulted rectangular cavity measuring 5.95 metres long, 4.10 m wide and 4.80 m high. When opened in 1660, the chamber was found to be decorated with frescoes, which were recorded by Pietro Santi Bartoli. Only scant traces of these frescoes survive, and no trace of any other contents. The tomb had been sealed when it was built, with no exterior entrance, but had been plundered at some time thereafter, probably during antiquity. Until the end of restoration works in 2015, it was not possible for visitors to access the interior, except by special permission typically only granted to scholars. Since the beginning of May 2015, the pyramid is open to the public every second and fourth Saturday each month. Visitors must arrange their visit in advance.

The Circus Maximus is an ancient Roman chariot racing stadium and mass entertainment venue located in Rome, Italy. Situated in the valley between the Aventine and Palatine hills, it was the first and largest stadium in ancient Rome and its later Empire. It measured 621 m in length and 118 m in width and could accommodate over 150,000 spectators. In its fully developed form, it became the model for circuses throughout the Roman Empire. The site is now a public park.Events and usesThe Circus was Rome's largest venue for ludi, public games connected to Roman religious festivals. Ludi were sponsored by leading Romans or the Roman state for the benefit of the Roman people (populus Romanus) and gods. Most were held annually or at annual intervals on the Roman calendar. Others might be given to fulfill a religious vow, such as the games in celebration of a triumph. The earliest known triumph ludi at the Circus were vowed by Tarquin the Proud to Jupiter in the late Regal era for his victory over Pometia.

The Palatine Hill is the centermost of the Seven Hills of Rome and is one of the most ancient parts of the city. It stands 40 metres above the Roman Forum, looking down upon it on one side, and upon the Circus Maximus on the other.It is the etymological origin of the word palace and its cognates in other languages (Italian palazzo, French palais, German Palast, Czech palác, etc.).EtymologyAccording to Livy (59 BC - AD 17) the Palatine hill got its name from the Arcadian settlement of Pallantium. More likely, it is derived from the noun palātum "palate"; Ennius uses it once for the "heaven", and it may be connected with the Etruscan word for sky, falad.The term palace itself stems from Palatium.MythologyAccording to Roman mythology, the Palatine Hill was the location of the cave, known as the Lupercal, where Romulus and Remus were found by the she-wolf Lupa that kept them alive. According to this legend, the shepherd Faustulus thereafter found the infants, and with his wife Acca Larentia raised the children. When they were older, the boys killed their great-uncle (who seized the throne from their grandfather), and they both decided to build a new city of their own on the banks of the River Tiber.

The Arch of Constantine is a triumphal arch in Rome, situated between the Colosseum and the Palatine Hill. It was erected by the Roman Senate to commemorate Constantine I's victory over Maxentius at the Battle of Milvian Bridge in 312. Dedicated in 315, it is the largest Roman triumphal arch. The arch spans the Via triumphalis, the way taken by the emperors when they entered the city in triumph.Though dedicated to Constantine, much of the decorative material incorporated earlier work from the time of the emperors Trajan, Hadrian and Marcus Aurelius, and is thus a collage. The last of the existing triumphal arches in Rome, it is also the only one to make extensive use of spolia, reusing several major reliefs from 2nd century imperial monuments, which give a striking and famous stylistic contrast to the sculpture newly created for the arch. This earned it the derisive nickname of Cornacchia di Esopo Aesop's Crow.The arch is 21 m high, 25.9 m wide and 7.4 m deep. It has three archways, the central one being 11.5 m high and 6.5 m wide and the lateral archways 7.4 m by 3.4 m each. Above the archways is placed the attic, composed of brickwork reveted with marble. A staircase within the arch is entered from a door at some height from the ground, on the west side, facing the Palatine Hill. The general design with a main part structured by detached columns and an attic with the main inscription above is modelled after the example of the Arch of Septimius Severus on the Roman Forum.

The Colosseum or Coliseum, also known as the Flavian Amphitheatre, is an oval amphitheatre in the centre of the city of Rome, Italy. Built of concrete and sand, it is the largest amphitheatre ever built. The Colosseum is situated just east of the Roman Forum. Construction began under the emperor Vespasian in AD 72, and was completed in AD 80 under his successor and heir Titus. Further modifications were made during the reign of Domitian (81–96). These three emperors are known as the Flavian dynasty, and the amphitheatre was named in Latin for its association with their family name (Flavius).The Colosseum could hold, it is estimated, between 50,000 and 80,000 spectators, having an average audience of some 65,000; it was used for gladiatorial contests and public spectacles such as mock sea battles (for only a short time as the hypogeum was soon filled in with mechanisms to support the other activities), animal hunts, executions, re-enactments of famous battles, and dramas based on Classical mythology. The building ceased to be used for entertainment in the early medieval era. It was later reused for such purposes as housing, workshops, quarters for a religious order, a fortress, a quarry, and a Christian shrine.

The Tiber Island is the only island in the Tiber river which runs through Rome. Tiber island is located in the southern bend of the Tiber.The island is boat-shaped, approximately 270m long and 67m wide, and has been connected with bridges to both sides of the river since antiquity. Being a seat of the ancient temple of Asclepius and later a hospital, the island is associated with medicine and healing.HistoryThe island has been linked to the rest of Rome by two bridges since antiquity, and was once called Insula Inter-Duos-Pontes which means "the island between the two bridges". The Ponte Fabricio, the only original bridge in Rome, connects the island from the northeast to the Field of Mars in the rione Sant'Angelo (left bank). The Ponte Cestio, of which only some original parts survived, connects the island to Trastevere on the south (right bank).There is a legend which says that after the fall of the hated tyrant Tarquinius Superbus (510 BC), the angry Romans threw his body into the Tiber. His body then settled onto the bottom where dirt and silt accumulated around it and eventually formed Tiber Island. Another version of the legend says that the people gathered up the wheat and grain of their despised ruler and threw it into the Tiber, where it eventually became the foundation of the island.

The Temple of Venus and Roma Latin: Templum Veneris et Romae is thought to have been the largest temple in Ancient Rome. Located on the Velian Hill, between the eastern edge of the Forum Romanum and the Colosseum, it was dedicated to the goddesses Venus Felix ("Venus the Bringer of Good Fortune") and Roma Aeterna ("Eternal Rome"). The architect was the emperor Hadrian and construction began in 121. It was officially inaugurated by Hadrian in 135, and finished in 141 under Antoninus Pius. Damaged by fire in 307, it was restored with alterations by the emperor Maxentius.HistoryIn order to build the temple, erected on the remnants of the porticoed vestibule to Emperor Nero's Domus Aurea, the Colossus of Nero was moved and placed near the amphitheatre, which shortly afterwards became known as the Colosseum. Unimpressed by his emperor's architectural skills, Hadrian's most brilliant architect, Apollodorus, made a scornful remark on the size of the seated statues within the cellae, saying that they would surely hurt their heads if they tried to stand up from their thrones. Apollodorus was banished and executed not long after this.

Ponte Sisto is a bridge in Rome's historic centre, spanning the river Tiber. It connects Via dei Pettinari in the Rione of Regola to Piazza Trilussa in Trastevere. The construction of the current bridge occurred between 1473 and 1479, and was commissioned by Pope Sixtus IV (r. 1471-84), after whom it is named, from the architect Baccio Pontelli, who reused the foundations of a prior Roman bridge, the Pons Aurelius, which had been destroyed during the early Middle Ages. Currently traffic on the bridge is restricted to pedestrians.Roman Pons AureliusThe predecessor bridge to Ponte Sisto, the Pons Aurelius, was first mentioned by authors in the 4th and 5th centuries and was later known in the Middle Ages as "Pons Antoninus", "Pons Antonini in Arenula", and "Pons Ianicularis id est pons ruptus vulgariter nominatus et Tremelus et Antoninus".The Pons Antoninus was partially destroyed in 772, at the time the Lombard king Desiderius took Rome, and rebuilt in its current form by Pope Sixtus IV, whose name it carries to this day.Renaissance Ponte SistoThe bridge is architecturally characteristic because of the circular "oculus" or eye lightening the masonry of its central spandrel: this was erected to diminish the river's pressure on the bridge in case of flood.On the left bridge head are placed the copies of two marble slabs (removed in the 1990s after continued vandalism) bearing an elegant Latin inscription composed by Renaissance humanist Bartolomeo Platina in honour of Sixtus IV in occasion of the construction of the bridge. They recite:

The Roman Ghetto or Ghetto of Rome, Ghetto di Roma, was a Jewish ghetto established in 1555 in the Rione Sant'Angelo, in Rome, Italy, in the area surrounded by present-day Via del Portico d'Ottavia, Lungotevere dei Cenci, Via del Progresso and Via di Santa Maria del Pianto, close to the River Tiber and the Theatre of Marcellus. With the exception of brief periods under Napoleon from 1808 to 1815 and under the Roman Republics of 1798-99 and 1849, the ghetto of Rome was controlled by the papacy until the capture of Rome in 1870.